we need to protect their environment. we have a strict quarantine system to protect the integrity of the environment. forty years on, it's still a class-a nature reserve. it's our job to look after them. ...it's my job to look after it. ♪ >> pam: we continue our coverage tonight. on the manhunt for a man targetting police officers in los angeles. the suspect, a former police officer and navy reservist- christopher dorner - considers himself a whistle- blower -- who was wrongly fired by lapd because of it. he was furious about losing his job in 2008. and wrote a "manifesto'. discussing his plans for revenge. catherine heenan has details on that. >>catherine: despite all the photos showing a smiling christopher dorner. he has apparently been a very angry man. february 4th around 9 in the morning.he sat down to write his so-called manifesto on facebook. addressing it to "america". subject matter - "last resort" saying he wants to 'reclaim his name'. dorner says in part that he was targeted by the los angeles police departm